Application of nanosecond pulse laser in coding of new energy batteries

June 6, 2024
Latest company news about Application of nanosecond pulse laser in coding of new energy batteries

Aluminum alloy have outstanding advantages such as low density, high strength and corrosion resistance. It is widely used in industrial


equipment and daily consumer goods, especially in the currently popular new energy battery industry. The shell and cover of lithium batteries


use a lot of aluminum alloy. In the production process of lithium batteries, in order to control the production quality, it is necessary to trace the


entire production information, including incoming material information, production process, product batch, production manufacturer, date, etc.


The key information needs to be stored in the QR code and marked on the battery shell.

Application background of laser coding of new energy batteries

The traditional surface marking methods of aluminum alloys mainly include inkjet marking, mechanical etching and electrochemical corrosion.


The graphics of inkjet marking are easy to wipe and damage, and the information is easy to be deliberately tampered with. The graphics of


mechanical etching cannot be modified once etched. If an error occurs, the material must be recycled and processed as a whole, which is not


conducive to production in terms of cost. It is difficult to accurately control the degree of etching during electrochemical marking and


preservatives need to be removed, which is also very polluting to the environment. Laser marking has the characteristics of strong


permanence, high anti-counterfeiting, high precision, strong wear resistance, safety and reliability, and is the best solution for QR code



Introduction to coding application characteristics and laser recommendation

QR code is also called two-dimensional barcode. Common QR codes include Data Matrix and QR Code. QR code is a more advanced


barcode format rather than one-dimensional code. One-dimensional code can only express information in one direction (generally horizontal),


while QR code can store information in both horizontal and vertical directions. One-dimensional code can only be composed of numbers and


letters, while QR code can store information such as Chinese characters, numbers and pictures, so the application field of QR code is more



Raycus 20/30/50Qmini nanosecond pulse fiber laser has the characteristics of smaller size, lighter weight, maintenance-free, higher reliability


and better beam quality. Compared with traditional lasers, the power instability at rated power is ≤±1.5%. 20/30/50Qmini nanosecond pulse


fiber laser can be widely used in marking processing in new energy, 3C and hardware industries.


New energy battery coding application test

To mark a QR code, you first need to ensure that the overall outline of the QR code is clear, which can be achieved by adjusting the light-on


delay and light-off delay. Since the laser-marked QR code is formed by the overlap of several single-pulse light spots, the galvanometer


scanning speed and the laser repetition frequency jointly determine the overlap rate of the light spots. Only when a certain light spot overlap


rate is achieved under the appropriate parameter combination can a QR code with a certain grayscale or color be marked. Therefore, before


conducting a QR code marking test, you must first find the appropriate scanning speed, repetition frequency, fill line spacing and other




Currently, the most efficient way to mark a QR code on the battery cover is to mark a QR code with a white effect. The advantage of Raycus


20/30/50Qmini laser is that the marking time is short, which can meet the processing of 8mm*8mm QR codes within 1 second. And the reading


efficiency and reading success rate are high, which meets the beat of high-speed production lines.

Fill line spacing is an important factor affecting processing efficiency. The smaller the fill line spacing, the more lines are repeatedly arranged in


the same graphic area, and the longer the processing time. If the fill line spacing is too large, it is impossible to get enough spot overlap. After


experimental analysis, it was found that the filling line spacing of 0.05 mm is the most suitable parameter under the premise of satisfying


processing efficiency.


As the power increases, the color of the QR code gradually becomes whiter, and the QR code becomes fuller.